Chapter 4.5 - Event Handlers and Data Validation

Chapter 4.5 - Event Handlers and Data Validation (Last Updated: 9/4/2025)

• 4.5.1 How to Implement the Factory Pattern [5 minutes] (Last Updated: 9/4/2025)
• 4.5.2 Why we Use the Factory Pattern [5 minutes] (Last Updated: 9/4/2025)
• 4.5.3 How to Add and Use Combo Boxes [5 minutes] (Last Updated: 9/4/2025)
• 4.5.4 How to Use the Ternary Operator [5 minutes] (Last Updated: 9/4/2025)
• 4.5.5 How to Use Regular Expressions [5 minutes] (Last Updated: 9/4/2025)